Veterinary surgical instrument.



. 'PATENTED AUG. 25, 1903,

G. H. SUMMERPBLDT, VETERINARY SURGIGALIINSTRUMENT.

APPLICATION FILED NOV. 1, 1900.

no MODEL.

vJ R.Z 0 W N m E WI H6 mu &

UNITED STATES Patented August 25, 1903.

PATENT OFF CE.

VETERINARY SURGICAL INSTRUMENT.

srncmrcnrron forming part of Letters PatentNo. 737,293, dated August 25,1903. Application filed November 1. 1900. Serial No. 35 ,104. on model.)

To all whom, it m/aty concern: I

Be it known that I, GEORGE H. SUMMER FELDT, a citizen of the UnitedStates, and a resident of Gouverne'ur, in the county of St. Lawrence andState of New York, have made a certain new and useful Invention inVeterinary Surgical Instruments; and I declare the following to be afull, clear, and exact description of the same, such as will enableothers skilled in the art to which it appertains to make and use theinvention, reference being had to the accompanying drawings, and

. to letters of reference marked thereon, which form a part of thisspecification.

Figure 1 is a perspective view of my invention. Figs. 2 and 3 are detailviews of separate parts thereof. Fig. 4 is a longitudinal section of myinvention. Fig. 5 is a detail cross-section of the invention.

The invention relates to veterinary surgical instruments; and itconsists in the novel construction and combinations of parts, ashereinafter set forth.

The object of the invention is to provide an instrument which will servenot only as a milk-tube, but also as a rotary bistoury for cuttingabunch in the teat of a cow and taking'the core out of the same withoutinjuring the teat.

The instrument consists of an outer pointed tube and an innerknife-tube. The outer tube a is formed with a pointed end b,'and nearsaid pointed end is an elongated opening a in one side of said tube. Thepointed end is usually made angular in -such a manner that the point canbe made to cut its way.

through the obstruction or bunch in the teat. At the back of the pointand between the same and the slotor opening 0 the tubular portion isprovided with a journal recess or seat 61 to receive the end of therotary knife device. The opposite or outer end of the tube a is providedwith a small guard-slot e next the marginal rim or flange f, which isnotched at g to communicate with the slot 6 at one end thereof, asshown. The outer end portion of the tube a is provided with'bows orfingerpurchases 71, whereby the operator is enabled to handle theinstrument in a firm an safe manner.

It represents the inner knife-tube or hollow rotary bistoury. Thisconsists of the shank portion '6, having a purchase-ring at its outerend, and near said outer end asmall stud 11.,

The inner end of thisv slot or opening m, which corresponds in positionto that ofthe outer tube and terminates at the end of the tube. This endis closed,

as indicated at-n, to form a combined journal and cleaner flange, whichengages the recess or seat d at the back of the point of the outer tubewhen the knife-tube is pushed home therein. The slot m is provided atone side, corresponding to that of the stud n, with an elongated edgeknife z, said edge knife serving to form the edge of the slot m andlying flush, or nearly so, therewith, so that there is no projection ofthe cutting edge, which is designed to operate by rotation only.

When the knife-tube is pushed into the outer or pointed tube in such amanner that its stud will pass through the rim-notch g into the end ofthe arc-slot e, the elongated slot 0 of said outer tube will be closedby the cylindrical back 1) of the knife-opening m, and when the knifetube or shank is in this position the knife-edge is concealed andguarded and the pointed tube is in smooth and proper shape to be pushedintothe milk-duct of the teat and through or by any bunch or interiorexcrescence thereof, the location whereof is readily ascertained byfeeling. Then having brought the slotted portion of the tube in properposition with relation to the bunch or excrescence the knife-tube isturned in the outer tube, which is held steady, thus opening the slot ofsaid outer tube, into which the bunch or excrescence at once extends,when by turning the outer tube upon the inner or knife tube theknife-edge will cutout the core or main portion of the bunch and inclosethe same in the tube, whereby it can be drawn out through the outertube. The latter tube can remain to providea free outlet for the milk.When the outer tube is to be removed, the inner tube should be pushedhome therein in closed position in order to' avoid excoriating theinterior of. the milkduct.

It will be observed that the position of the knife with relation to 'thestud n is such that the inner tube or hollow bistoury cannot be removedfrom the outer tube until the knife-edge is turned to concealed andhollow tube having an elongated slot proguarded position and theelongated opening vided with a knife-edge at its inner end porclosed.tion, a circular combined journal and cleaner 15 Having described thisinvention, what I flange at its inner extremity, and a stud near 5claim, and desire to secure by Letters Patent, its outer end fitting insaid guard-slot, subisstantially as specified.

The combined milk-tube and rotary knife, In testimony whereof I affix mysignature consisting of the outer pointed tube, having in presence oftwo witnesses.

an elongated slot at its inner end portion, and G. H. SUMMERFELDT. 10 ajournal-recess between said slot and the Witnesses:

point of the tube, said tube having a guard- GILBERT E. HUTTON,

slot at its outer end portion, and the inner THOS. L. RUTHERFORD.

